Using the "Tape Tool" changes the direction of the vector.

[beeheemooth]

Issue Summary

Using the Tape Tool changes the direction of the vector, which leads to incorrect auto-inbetweening.

Screenshot or Video Reference

Steps to Reproduce

1. Create a vector layer with more than two frames (for example, 12)
2. Draw (from left to right) in the first frame two non-intersecting lines as in the video.
3. Copy and paste them into the last frame (12)
4. Select all the frames in the Level Strip and perform the "Inbetweens" operation (the interpolation doesn't matter)
5. Go to the first frame, select the Tape Tool (Normal, Endpoint to Line, Join Vectors, Smooth)
6. Connect the end of one of the lines with the other line (do not connect the ends, so as not to form one solid vector)
7. Select all the frames in the Level Strip and perform the "Inbetweens" operation again. As a result of applying the Tape Tool, the second vector changed direction.

Expected Results

The direction of the vector should not be changed, since the "Tape Tool" was used for editing.

Actual Results

The direction of the vector changes if the "Tape Tool" has been applied to the beginning of the vector.

System Information

• Operating System: Windows 8.1

[RodneyBaker]

I confirm the problem here.

I can occasionally get the line not to flip but I'm not sure what I'm doing that keeps that from happening when it does behave correctly. It would appear that the only difference is in drawing the lines from right to left instead of left to right.

[RodneyBaker]

I repeated the test but instead used a drawn squiggly line and get the same flipping result when drawing strokes from left to right... and after adding the Tape Tool connection. However, again... when drawing them right to left the auto-inbetween do not flip.

[artisteacher]

It looks like it’s actually based on what side you are connecting, not the line direction on its own. Ie. Make the 2nd line (that you are connecting to the first) on the left of the first line instead of the right. If that 2nd line is drawn from right to left, it can trigger this too.

You can actually see the direction change in direction if you have vector guided drawing enabled without using the inbetweener function.

[beeheemooth]

[RodneyBaker]

Closing as this issue has a partial fix that addresses the reported issue but due to other related issues needs to slip to 2019 development cycle to be more fully addressed.

For more information on how this fix can be used now see PR #2355.